Writers abandoning their characters is nothing new with this games development, and if it continues to be a problem then the dev's need to address it. Imagine if wsan just decided to leave the game. What happens then? Do we just drop Khor'Minos, or do we drop Brint and Brienne? Imagine just dropping a key quest and a companion plus all the other content because one the person that was working on it left, and then telling the people paying on patreon or who bought the game on steam, sorry guess we won't finish the main quest cause our staff quit. That would be unacceptable.
Well, for one, the difference between Hugs and Wsan is Wsan is a full time employee, Hugs was not. Which is why Wsan has been trusted with more responsibility.
And, tbf -they have addressed it. Like it or not, what they have done is addressing the problem.
In both CoC1 and Tits, when a writer abandoned a character - that was it, no more work on the character, just sat there unfinished forever.
In CoC2, they limited the amount of important characters people could write to avoid said issue, and made a statement up front in their design docs that outlined what would happen if someone abandoned a companion - someone else would take over. They then paid someone to tie off the loose end that was said abandoned character.
By any definition, there was a problem and they addressed said problem. How
well they addressed said problem is up in the air, but unlike the previous two games, they actually put effort into doing so.